I'll give you a hint
20) Add 56 to both sides
23) Add 1.5 to both sides
Also, as a AP Calc BC student, laziness doesn't really help get a good job soo...
If my mom does not have to work, then i do not have to babysit my little sister
The percent of runners between these two times is 47.72.
We find the z-scores associated with each end of this interval using the formula
z=(X-μ)/σ
For the lower end,
z=(4.11-4.41)/0.15 = -0.3/0.15 = -2
Using a z-table (http://www.z-table.com) we see that the area to the left of, less than, this score is 0.0228.
For the upper end:
z=(4.41-4.41)/0.15 = 0/0.15 = 0
Using a z-table we see that the area to the left of, less than, this score is 0.5000.
We want the area between these times, so we subtract:
0.5000-0.0228 = 0.4772
This corresponds with 47.72%.
In the data that are given above, it can be seen that the first point is $1.1 million, the second is $1.4 million which is 0.3 million greater than the first. Also, the third is $1.7 million which is $0.3 million greater than the third. The equation that best represents the given scenario is,
0.8 + 0.3(n)
The answer is the first choice.
